package main

import (
	"fmt"
)

func main() {
	fmt.Println(0 & 2)
	fmt.Println(191 & 2)
	fmt.Println(191 & 2)
	fmt.Println(191 & 2)
	fmt.Println(191 & 2)

	fmt.Println("=========")
	fmt.Println(191 & 1)
	fmt.Println(191 & 1)
	fmt.Println(191 & 1)
	fmt.Println(191 & 1)
	fmt.Println(101 & 1)
}
